メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.390167191326 43.781365548182, 142.389100687483 43.7816782050206, 142.389089838052 43.7816711853816, 142.388858464459 43.7815192862406, 142.388556892593 43.7812812548734, 142.388304381065 43.781068533221, 142.387855238497 43.7805821398674, 142.387820120226 43.7805365246208, 142.389443097958 43.7800577950327, 142.390167191326 43.781365548182)) ^^http://www.opengis.net/ont/geosparql#wktLiteral